Different clients have different implementations, but it's basically a trust score for a given user relative to your follows list.

Different clients have different implementations, but it's basically a trust score for a given user relative to your follows list.

What’s the difference between the checkmark and network icons in coracle
The checkmark means you follow that person
primal has a really simple one that doesn't evaluate anything just shows you posts from follows of follows... which means i have to manually mute a lot of GM posters